Sean Clarke wrote:
> 
> Then that is it...
> I will try to replace that chuck on cable and terminators and see what
> happens ..  I know the test 50 will fail the NI if there isnt any
> termination or something wrong with the cable.  But I get the same ?? NI
> blahh blahh with or without terminators etc?

What happens if you disconnect the cable, and connect just the
T-connector and two terminators?  Does the the error still show up?